Tmax T7S/T7H/T7L 1250A PR232/P LSI 3P/4P Circuit Breaker

Name: Tmax T7S/T7H/T7L 1250A PR232/P LSI 3P/4P Circuit Breaker
Brand: A-B-B original
SKU: 1601291639190

Brand Name:A-B-B original
Place of Origin:China
Model Number:T7S, T7H, T7L
Rated Frequency (Hz):50/60hz
Breaking Capacity:50kA,100kA,70kA
Rated Voltage:690V
Trip Unit:Electronic adjustable
Type:Moulded Case
Poles Number:3P, 4P

Poles

Rated Current

SKU: 1601291639190 Category: Others

Description

Tmax Molded Case Circuit breaker is now available as a complete range of up to 1600 A.
–  Manually operated or Electrically operated.
– All available in the Fixed version; T4 and T5 has Plug-in version; T4, T5, T6 and T7 has Withdrawable version as well.
–  With the same frame size, the circuit-breakers are available with different breaking capacities and different rated currents.
–  IEC or UL standards

Model Number	Tmax T7S (50kA), Tmax T7H (70kA), Tmax T7L (120kA)
Pole	3 Pole, 4 Pole
Rated Current	800A, 1000A, 1250A, 1600A
Tripping Unit	PR231/P-LSI, PR232/P-LSI, PR331/P-LSIG, PR332/P-LI, PR332/P-LSI, PR332/P-LSIG
Delivery Time	15 days

Additional information

Weight	13 kg
Dimensions	23 × 23 × 23 cm
Rated Current	1250A
Poles	3P

Technical Datasheet & Downloads

📄 Technical Documentation & Product Specifications

Download official engineering datasheets, certified test standards (IEC / UL / CE), wiring diagrams, and dimensional drawings for Tmax T7S/T7H/T7L 1250A PR232/P LSI 3P/4P Circuit Breaker.

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Official Technical Datasheet (PDF) Complete electrical ratings, tripping characteristics, dimensions, and compliance specifications.

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2D/3D CAD & Dimensional Drawings STEP, DXF, and PDF CAD drawing files for panel builders and switchgear designers.

Technical FAQ & Selection Guide

💡 Frequently Asked Technical Questions & Selection Guide

Pure engineering specifications, tripping curve parameters, and electrical selection guidance for panel builders and system designers.

Voltage & Load Sizing

How to verify rated operational voltage, frequency, and load duty cycle?

Verify that the nominal line voltage (AC 230V single-phase or 400V/415V/690V three-phase at 50/60Hz, or DC voltage ratings) falls within the continuous maximum operating limits of the device. Check duty cycle ratings (continuous vs intermittent duty) to ensure thermal stability under full load.

Protection & Environment

What ingress protection (IP Rating) and environmental enclosures are recommended?

For clean indoor electrical rooms, standard IP20 modular DIN-rail housings are recommended. For outdoor, industrial washdown, or dusty environments, mount components inside weatherproof enclosures rated IP65/IP66 with UV-resistant polycarbonate or powder-coated steel enclosures equipped with compression cable glands.

Selectivity & Grading

How to ensure upstream and downstream coordination in power distribution boards?

Ensure proper discrimination by grading current thresholds and tripping time delays: upstream devices should have higher current ratings and intentional short-time delays (Class S), allowing downstream branch MCBs to clear localized faults without blacking out the entire facility.

Installation & Mounting

What mounting rails, busbars, and spatial clearances are required?

Components mount on standard symmetrical 35mm DIN rail (EN 60715 / TH35-7.5) or backplate screw fixings. Maintain recommended top/bottom ventilation gaps (typically 30–50mm) to ensure unrestricted air convection, and use standard pin/fork comb busbars to minimize contact resistance and wiring errors.

Conductor & Torque Sizing

What conductor sizes and terminal tightening torques should be applied?

Select copper or aluminum conductor cross-sections complying with IEC 60364-5-52 current-carrying capacity tables based on continuous load. Always use a calibrated torque screwdriver or torque wrench to tighten terminal screws to the manufacturer-specified torque to prevent hot-spot degradation and loose connections.